Accession Number : ADA293516

Title :   Improved Tungsten Penetrators.

Descriptive Note : Final rept. 23 Feb-23 Aug 93,

Corporate Author : ADVANCED TECHNOLOGY MATERIALS INC DANBURY CT

Personal Author(s) : Stevens, Ward ; Lang, Patrick

PDF Url : ADA293516

Report Date : SEP 1994

Pagination or Media Count : 50

Abstract : Kinetic energy penetrators composed of tungsten based alloys avoid the cost and toxicity issues associated with uranium. In this program, High Pressure Float Zone crystal growth was investigated as a means of producing single crystal and oriented polycrystalline tungsten and tungsten alloys X-ray diffraction, high rate compression testing, and optical microscopy were used to assess the results. Attempts to float zone pure tungsten were unsuccessful because the high powers required to melt tungsten resulted in electrical arcing between the sample and the induction coil. Lowering the melting temperature through alloying with nickel, iron, and rhenium proved successful and in certain cases resulted in elongated grains. In most cases the high rate compression test results were similar to most tungsten alloys reported elsewhere; the samples showed strain hardening. While polycrystalline tungsten rods produced with a traveling nickel-iron molten zone showed some signs of softening, each of these samples rubblized during testing. Further work would be required to determine the nature of these samples microstructural response and any benefits to penetrator performance Samples of each material were delivered to the Army for further testing. (MM)

Descriptors :   *KINETIC ENERGY PROJECTILES, *MELTING POINT, *ARMOR PIERCING AMMUNITION, *TUNGSTEN ALLOYS, MICROSTRUCTURE, TOXICITY, DEFORMATION, X RAY DIFFRACTION, SINGLE CRYSTALS, IRON, PENETRATION, NICKEL, TUNGSTEN, CRYSTAL GROWTH, SINTERING.

Subject Categories : Fabrication Metallurgy
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE